614 STUDIES ON AUSTRALIAN MOLLUSCA, 



and fourth with a median keel and transverse bars. Aperture 

 subquadrate, spur of the lip crossing the pillar; anal notch simple, 

 rather deep. Canal short, straight. Length 11; breadth 3 mm. 



Hah. — Pearl Bay, Middle Harbour; alive under stones at low 

 tide, taken by myself. 



Type. — To be prosented to the Australian Museum. 



Among local species this is distinguished by its large size, 

 slender shape and uniform purple colour. 



Triphora MACULOSA, n.sp. 

 (Plate xxxii., figs. 32, 33.) 



Shell conical, rather broad and solid. Whorls ten, parted by 

 distinct and deep sutures. Colour : irregularly variegated with 

 opaque white, buff and chocolate, usually articulated with choco- 

 late and white beneath the sutures, base chocolate and apex 

 white. Sculpture : the base has two plain spiral keels, above 

 which are four rows of gemmules, the penultimate whorl and 

 those immediately above have each three rows of gemmules; on 

 the seventh the median row diminishes and on the whorls above 

 gradually disappears, leaving two rows only on the upper whorls. 

 The gemmules are round hemispherical bosses, set their own 

 diameter apart, about 25 to a whorl, linked by a string to their 

 fellows in the same and their neighbours in the next row. Apex 

 rather styliform, the second whorl has one keel, the third two, 

 after which the keels develop gemmules and assume the adult 

 sculpture. Aperture perpendicular, subquadrate, anal notch pro- 

 duced on the right into a spur which crosses the pillar; anal 

 notch simple, shallow. Canal short and straight. Length 6*7; 

 breadth 2*1 4mm. 



Hah. — Balmoral Beach, Middle Harbour, Sydney; common as 

 dead shells on the beach. 



Type. — To be presented to the Australian Museum. 



Arthur Adams, the evil genius of Australian conchology, 

 applied the MS. name of Triphoris maculosus to a Sydney species. 

 An unfortunate entry of this name in the Catalogue of Angas 

 (P.Z.S. 1877, p. 184) is the sole record concerning it. As local 



